Thermometer



A.V.GROUPE THERMOMETER Filed Dec. 13, 1923 Patented Dec. 29, i925.

UNITED STATES ANDREW VJ GROUPE,` OF: PHILADELPI-IA, PENNSYLVANIA.

THERMOMETER.

Application filed December 13, 1923. Serial No. 680,378.

To ,all 'whom it may concern: A

Be it known that L ANDREW V. Giionrin a citizen ofthe Unitedv States,residmg at Philadelphia, in the county of Philadelphia and State of Pennsylvania,lhave invented certain new anduseful Improvements in Thermometers, of which the followingis a specification. D

i This ,inventionrelates to improvements 1n thermometers of the class usually applied .to boilersto indicate the temperature of water therein. y

Thermometers of.` this class, as generally .`stated, eachxcomprise a vertically extending body` portion, a tubular connecting member projecting` downwardly from the bodyportion, a hollow fitting for `receiving the connecting member and for connecting thether-mometer toa boiler, and a mercury tube carried by 4thebody portion and extending; down through the `tubular connect-ing memberand into the hollow fitting.`

The primary object oftheinvention to provide a thermometer of novel, inexpensive, and durable construct-ion inwliich the'b'ody portion is formed of a singlepgiece of pressed sheet f metal and provided with a` tubular connecting. member extending fixedly 'therefrom, and in which the mercury tube is backed and-supported by the body portion substantially throughout the length of the exposedportion of the tube while permitting the mercury tube to extend centrally through the tubular connecting member. A

` further object of thisinventionis to provide.

a strong and: durable connection between the body portion 'and the tubular connecting member.

With the" foregoing sand 'related objects in view, the inventionconsists in the novel construction, combination, 'and arrangementof parts hereinafter described and claimed;`

the main body portion of the thermometer,

5 a downwardly directed, tubular connecting member extending downwardly from the body portion, (3 a fitting for connecting the thermometer to a boiler, and 7 a mercury or equivalent liquid containing tube.

The body portion lis formed of a single piece of sheet metal pressed into shape to form a vertically extending scale panel 8 having a forwardly extending base flange 9 at the lower end thereof, and a surrounding or frame flange 8 from which the panel 8 is depressed.

The tubular connecting member 5 is permanently attached to the body portion l and `it is, in. effect, an integral part thereof, and, to this end, it may be formed and associated with the body portion 4: in any suitable manner. As herein illustrated it is formed separately from the body portion a and preferably of a single piece of sheet metal and it comprises a tube 1U having an outwardly extending flange 1l on the upper end thereof and an arm or brace l2 extending upwardly from the rearward portion of the tube 10. lVhen the body portion l and connecting member 5 areassembled, the bottom ofthe base flange 9 engages the top of the Harige 11 of the connecting member, and the upper portion of the arm or brace 12 engages the back ofthe panel 8. The body portion -land connecting member 5 may be secured together4 in any convenient manner. For this purpose I preferably employ spot welding; and weldlthe body portion #l and inember 5 together in the regions indicated at 13 in the drawings.

, A mercury or equivalent liquid containing tube 7 is secured against the face of the panel 8 by means of suitable brackets 15 which embrace the tube 7 and which are connected tothe panel 8 by small bolts 16 which extend through the brackets and panel. The mercury tube 7 extends downwardly from the panel 8 through an opening 17 in the flange 9 and through the central portion of the tube 10 to and below the lower end thereof; and the mercury tube '7 is held centrally wit-hin the connecting tube 10 by a sleeve 18 of rubber or other yielding material fitted to the interior of the connecting tube and closely fitting the mercury tube.

The construction and arrangement of the parts of the body portion a and the connecting member are such as to enable me to locate the panel 8 in a vertical position over the opening surrounded by the tube 10 and to arrange the vertically extending central portion of the forward surface of the panel 8 so that the said forward surface will extend in a vertical plane which is located rearwardly of the axis of the connecting tube 10 and forwardly of the rear portion of the inner surface of the wall of the tube 10. The advantages gained by this novel arrangement of the parts are that the back of the mercury tube 7 is supported against breakage substantially throughout the entire length of its exposed portion and that the mercury tube 7 is permitted to extend centrally through the connecting tube 10, in a construction in which the main body portion of the thermometer is formed separately from its tubular connecting` member and of a single piece of pressed sheet metal.

The relation of the brace arm 12 and flange 11 of the connecting member 5 to the body portion 4, and the welding of the parts, as previously described, provide a stiff, rigid and durable connection between the parts.

AThe tube 10 of the connecting member 5 is fitted into the upper end portion of a well 19 formed in the fitting 6 which is provided with threads 2O and is adapted to Vbe screwed into a boiler to connect the thermometer thereto. The lower end portion of the mercury tube having the bulb thereon extends down into the lower portion of the well 19, and the lower end of the fitting 6 which forms the bottom portion of the well 19 extends down into the boiler when the fitting 6 is applied thereto. Mercury or other suitable heat transmitting material 21 is placed within the bottom portion of the well 19 to transmit heat from the wall of the well 19 to the mercury tube 7 when the wall of the well is heated by the water of the boiler into which it extends.

The-face of the panel 8 is provided with suitable scale markings 22 adjacent to the mercury tube 7 to indicate the temperature of the water within the boiler in accordance Y with the rise and fall of the top of the mercury column within the tube 7 as effected by the changes in'temperatiire of the water.

I claim: 1. In a thermometer, a body portion formed of a single piece of pressed sheet metal and having a vertically extending panel and a base flange extending forwardly rom the lower end thereof andA having an opening therein and being provided with a downwardly directed tubular connecting member extending fixedly therefrom, the.

panel having a front surface in a vertical plane rearward of the axis of the tubular connecting member and in front of the rear portion of the inner surface of the wall of the member, a mercury tube in parallel contact with said surface and extending through said opening and through the central portion of the tubular connecting member, and means to connect the mercury tube to the panel.

2. In a thermometer, a body portion formed of a single piece of pressed sheet metal and having a vertically extending panel and a base flange extending forwardly from the lower end thereof and having an opening therein, a separately formed, downwardly directed, tubular connecting member having its upper end portion permanently attached to the base flange of the body portion and having its interior forming a continuation of said opening, the panel having a front surface in a vertical plane rearward of the axis of the tubular connecting member and in front of the rear portion of the inner surface of the wall of the member, a mercury tube in parallel contact with ysaid surface and extending through said opening and through the central portion of the tubular connecting member, and means to connect the mercury tube to the panel.

3. In a thermometer, a body portion formed of a single piece of sheet metal and comprising a vertically extending panel having a base flange extending forwardly from the lower end thereof and having an opening therein, a tubular Iconnecting member having a flange on its upper end connected to the base flange and an upwardly extending arm connected to the back of the lower portion of the wardly of the panel and extending through said opening and through the central portion of the tubular connecting member, and means to connect the mercury tube to the panel.

t. In a thermometer, a body portion formed of a single piece of sheet metal and comprising a vertically extending panel having a base flange extending forwardly from the lower end thereof and having an opening therein, a tubular connecting member associated with the -body portion and extending downwardly from the base flange thereof with its interior forming a continuation of the opening in the base flange, said connecting member having an upwardly extending arm connected to the back of the lower portion of the panel, a mercury tube in front of the panel and extending through said opening and through the central portion of the connecting member, and means to connect the mercury tube to the panel.

5. In a thermometer, va body portion formed of a single piece of-sheet metal and comprising a vertically extending panel having a base flange extending-forwardly from the lower end thereof and having an openpanel, a mercury tube fory ing therein, a tubular connecting member having a iange on its upper end beneath and connected to the base flange and an upwardly extending arm connected to the back of the lower portion of the panel, the panel having a Jfront surface in a vertical plane which is located rearwardly of the axis of the tubular connecting member and in front of the rear portion of the inner surface of 10 the Wall of the tubular connecting member,

a mercury tube parallel and adjacent to said surface and extending therefrom through said opening and through the central portion of the tubular connecting member7 and means to connect the mercury tube to the panel.

In testimony whereof I affix my signature hereto.

ANDRFV V. GROUPE. 

